Corrosion characteristics of single-phase Mg-3Zn alloy thin film for biodegradable electronics  

作　　者：Ji-Woo Gu Jae-Young Bae Guangzhe Li Hae Won Hwang So-Hyeon Lee Sung-Geun Choi Ju-Young Kim Myoung-Ryul Ok Yu-Chan Kim Seung-Kyun Kang 

机构地区：[1]Department of Materials Science and Engineering,Seoul National University(SNU),Seoul 08826,Republic of Korea [2]Research Institute of Advanced Materials(RIAM),Seoul National University,Seoul 08826,Republic of Korea [3]Soft Foundry Nano Systems Institute(NSI),Seoul National University,Seoul 08826,Republic of Korea [4]Biomaterials Research Center,Biomedical Research Division,Korea Institute of Science and Technology(KIST),Seoul 34141,Republic of Korea [5]Division of Bio-Medical Science and Technology,KIST School,Korea University of Science and Technology,Seoul 02792,Republic of Korea [6]Department of Materials Science and Engineering,Ulsan National Institute of Science and Technology(UNIST),Ulsan 44919,Republic of Korea

出　　处：《Journal of Magnesium and Alloys》2023年第9期3241-3254,共14页镁合金学报（英文）

基　　金：supported by the Renewable Energy Technology Development (Develop technology to enhance reliability and durability for parts of hydrogen storage tank system) (2022303004020B) grant funded by the Korea Energy Technology Evaluation Planning (KETEP);the Ministry of Science and ICT (Development Project for Emerging Research Instruments Technology),(Project Number: (2022)ERIC)06_1;Commercialization Promotion Agency for R&D Outcomes (COMPA)。

摘　　要：Biodegradable metals as electrodes, interconnectors, and device conductors are essential components in the emergence of transient electronics, either for passive implants or active electronic devices, especially in the fields of biomedical electronics. Magnesium and its alloys are strong candidates for biodegradable and implantable conducting materials because of their high conductivity and biocompatibility, in addition to their well-understood dissolution behavior. One critical drawback of Mg and its alloys is their considerably high dissolution rates originating from their low anodic potential, which disturbs the compatibility to biomedical applications. Herein, we introduce a single-phase thin film of a Mg-Zn binary alloy formed by sputtering, which enhances the corrosion resistance of the device electrode, and verify its applicability in biodegradable electronics. The formation of a homogeneous solid solution of single-phase Mg-3Zn was confirmed through X-ray diffraction and transmission electron microscopy. In addition, the dissolution behavior and chemistry was also investigated in various biological fluids by considering the effect of different ion species. Micro-tensile tests showed that the Mg-3Zn alloy electrode exhibited an enhanced yield strain and elongation in relation to a pure Mg electrode. Cell viability test revealed the high biocompatibility rate of the Mg-3Zn binary alloy thin film. Finally, the fabrication of a wireless heater demonstrated the integrability of biodegradable electrodes and highlighted the ability to prolong the lifecycle of thermotherapy-relevant electronics by enhancing the dissolution resistance of the Mg alloy.

关 键 词：Biodegradable alloy Mg-3Zn binary alloy Solid-solution thin film electrode Biodegradable conductor Transient electronics 

分 类 号：TG146.22[一般工业技术—材料科学与工程]